[New] Add support for NVM_AUTH_HEADER env var

Co-authored-by: David Welch <david@davidwelch.co>
Co-authored-by: Andre Kradolfer <narfdre@gmail.com>

README.md

@@ -39,6 +39,7 @@
   - [Restoring PATH](#restoring-path)
   - [Set default node version](#set-default-node-version)
   - [Use a mirror of node binaries](#use-a-mirror-of-node-binaries)
+    - [Pass Authorization header to mirror](#pass-authorization-header-to-mirror)
   - [.nvmrc](#nvmrc)
   - [Deeper Shell Integration](#deeper-shell-integration)
     - [Calling `nvm use` automatically in a directory with a `.nvmrc` file](#calling-nvm-use-automatically-in-a-directory-with-a-nvmrc-file)
@@ -530,6 +531,17 @@ NVM_IOJS_ORG_MIRROR=https://iojs.org/dist nvm install iojs-v1.0.3
 
 `nvm use` will not, by default, create a "current" symlink. Set `$NVM_SYMLINK_CURRENT` to "true" to enable this behavior, which is sometimes useful for IDEs. Note that using `nvm` in multiple shell tabs with this environment variable enabled can cause race conditions.
 
+#### Pass Authorization header to mirror
+To pass an Authorization header through to the mirror url, set `$NVM_AUTH_HEADER`
+
+```sh
+export NVM_NODEJS_ORG_MIRROR=https://nodejs.org/dist
+export NVM_AUTH_HEADER="Bearer secret-token"
+nvm install node
+
+NVM_NODEJS_ORG_MIRROR=https://nodejs.org/dist NVM_AUTH_HEADER="Bearer secret-token" nvm install 4.2
+```
+
 ### .nvmrc
 
 You can create a `.nvmrc` file containing a node version number (or any other string that `nvm` understands; see `nvm --help` for details) in the project root directory (or any parent directory).

nvm.sh

@@ -116,12 +116,20 @@ nvm_get_latest() {
 }
 
 nvm_download() {
-  local CURL_COMPRESSED_FLAG
   if nvm_has "curl"; then
+    local CURL_COMPRESSED_FLAG=""
+    local CURL_HEADER_FLAG=""
+
+    if [ -n "$NVM_AUTH_HEADER" ]; then
+        sanitized_header=$(nvm_sanitize_auth_header "$NVM_AUTH_HEADER")
+        CURL_HEADER_FLAG="--header \"Authorization: $sanitized_header\""
+    fi
+
     if nvm_curl_use_compression; then
-      CURL_COMPRESSED_FLAG="--compressed"
+        CURL_COMPRESSED_FLAG="--compressed"
     fi
-    curl --fail ${CURL_COMPRESSED_FLAG:-} -q "$@"
+
+    eval "curl -q --fail ${CURL_COMPRESSED_FLAG:-} ${CURL_HEADER_FLAG:-} $@"
   elif nvm_has "wget"; then
     # Emulate curl with wget
     ARGS=$(nvm_echo "$@" | command sed -e 's/--progress-bar /--progress=bar /' \
@@ -133,11 +141,20 @@ nvm_download() {
                             -e 's/-sS /-nv /' \
                             -e 's/-o /-O /' \
                             -e 's/-C - /-c /')
+
+    if [ -n "$NVM_AUTH_HEADER" ]; then
+      ARGS="$ARGS --header \"$NVM_AUTH_HEADER\""
+    fi
     # shellcheck disable=SC2086
     eval wget $ARGS
   fi
 }
 
+nvm_sanitize_auth_header() {
+    # Remove potentially dangerous characters
+    echo "$1" | sed 's/[^a-zA-Z0-9:;_. -]//g'
+}
+
 nvm_has_system_node() {
   [ "$(nvm deactivate >/dev/null 2>&1 && command -v node)" != '' ]
 }
@@ -4357,7 +4374,7 @@ nvm() {
         nvm_sanitize_path nvm_has_colors nvm_process_parameters \
         nvm_node_version_has_solaris_binary nvm_iojs_version_has_solaris_binary \
         nvm_curl_libz_support nvm_command_info nvm_is_zsh nvm_stdout_is_terminal \
-        nvm_npmrc_bad_news_bears \
+        nvm_npmrc_bad_news_bears nvm_sanitize_auth_header \
         nvm_get_colors nvm_set_colors nvm_print_color_code nvm_wrap_with_color_code nvm_format_help_message_colors \
         nvm_echo_with_colors nvm_err_with_colors \
         nvm_get_artifact_compression nvm_install_binary_extract nvm_extract_tarball \

test/fast/Unit tests/nvm_download

@@ -1,7 +1,8 @@
 #!/bin/sh
 
 cleanup () {
-  unset -f die cleanup
+  unset -f die cleanup NVM_AUTH_HEADER
+  docker stop httpbin && docker rm httpbin
 }
 die () { echo "$@" ; cleanup ; exit 1; }
 
@@ -15,4 +16,12 @@ nvm_download "https://raw.githubusercontent.com/nvm-sh/nvm/HEAD/install.sh" >/de
 # nvm_download should fail to download wrong_install.sh
 ! nvm_download "https://raw.githubusercontent.com/nvm-sh/nvm/HEAD/wrong_install.sh" >/dev/null || die "nvm_download should fail to download no existing file"
 
+# nvm_download should pass when calling with auth header
+docker pull kennethreitz/httpbin && docker run -d --name httpbin -p 80:80 kennethreitz/httpbin
+sleep 1 # wait for httpbin to start
+NVM_AUTH_HEADER="Bearer test-token"
+nvm_download "http://127.0.0.1/bearer" > /dev/null || die "nvm_download unable to send auth header"
+unset NVM_AUTH_HEADER
+docker stop httpbin && docker rm httpbin
+
 cleanup